McDonnell Miller (173003) 150S-HD Head Mechanism with Automatic Reset

Model 150S-HD replacement head mechanism with snap-action switch assembly repairs Series 150S and Series 157S low water cut-off pump controllers for steam boilers. Replacement head mechanisms can be installed without disturbing existing equalizing connections or disassembly of components, making repair simple and easy.

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In you would like to return a product, you must first contact one of Customer Service Specialists for a Return Authorization. All return shipments must be prepaid by the customer. Made-to-order or custom products are non-returnable and non-refundable. Please note that there is a restocking fee for all returns.